For an easy starting point for creating activities, see
Participants, where you can use options instead of using Interfaces view. If you are not familiar with BPEL requirements for partner link types, you can begin in the Participants view.
One of the key productivity features of Interfaces view is accessing WSDL operations for use in your process designs. You can begin by creating an orchestration project, import your WSDL, and then from Interfaces, drag a port type operation to the Process Editor canvas. For details, see
Creating an Activity by Starting with a WSDL Interface.
If no WSDL elements exist in Interfaces view for an activity you need to create, select
New Interface
from the Interfaces toolbar. A wizard appears that helps you create a new WSDL. For details, see
Creating a New Interface.
For system service activities, such as sending an email or retrieving a user from an identity service, use an operation from a built-in WSDL. For details, see
System Services Interfaces.